raster3d: Initialize Cell_head structure contents before using it

If a structure is not initialized, it may contain random data. Avoid
that by initializing it.

This was found using cppcheck tool.

Signed-off-by: Mohan Yelugoti <ymdatta.work@gmail.com>

raster3d/r3.in.lidar/main.c

@@ -136,6 +136,30 @@ void binning_add_point(struct PointBinning3D *binning, int row, int col,
  }
 }
 
+static void cell_head_init(struct Cell_head *region)
+{
+ region->format = -1;
+ region->compressed = 0;
+ region->rows = 0;
+ region->rows3 = 0;
+ region->cols = 0;
+ region->cols3 = 0;
+ region->depths = 0;
+ region->proj = 0;
+ region->zone = 0;
+ region->ew_res = 0.0;
+ region->ew_res3 = 0.0;
+ region->ns_res = 0.0;
+ region->ns_res3 = 0.0;
+ region->tb_res = 0.0;
+ region->north = 0.0;
+ region->south = 0.0;
+ region->east = 0.0;
+ region->west = 0.0;
+ region->top = 0.0;
+ region->bottom = 0.0;
+}
+
 int main(int argc, char *argv[])
 {
  struct GModule *module;
@@ -364,10 +388,12 @@ int main(int argc, char *argv[])
  struct Cell_head current_region;
  struct Cell_head file_region;
 
+ cell_head_init(&file_region);
  G_get_set_window(&current_region);
 
  /* extent for all data */
  struct Cell_head data_region;
+ cell_head_init(&data_region);
 
  long unsigned header_count = 0;
  int i;